Automobile suspension shock absorber

Abstract

The present application relates to the technical field of automobile suspension damping, and specifically relates to an automobile suspension damper. The automobile suspension damper comprises a cylinder body, the cylinder body comprises an outer cylinder body and an inner cylinder body, the inner cylinder body is arranged in the outer cylinder body and the two top parts are sealed by a sealing element, a piston rod is arranged in the sealing element in a sliding mode, one end of the piston rod is arranged in the inner cylinder body and an extension column is connected to the end part, a plurality of slide grooves are formed on the outer surface of the extension column, and the automobile suspension damper further comprises a buffer assembly arranged at one end of the extension column. The buffer assembly comprises a piston with a cavity, and a plurality of arc-shaped grooves are formed on the upper surface of the piston in a circumferential equidistant mode. The automobile suspension damper is provided with the buffer assembly to adapt to the flow of oil liquid in the lower chamber to the upper chamber in different bumpy road sections, so that the piston rod can always slowly fall, the damping force received by the piston rod is in an optimal range to overcome the vibration of the automobile, and the stability of the automobile body is optimal, and the passengers obtain good comfort.

Description

Technical Field

[0001] This invention relates to the field of automotive suspension damping technology, and specifically to an automotive suspension damper. Background Technology

[0002] Most automotive suspension shock absorbers are hydraulic shock absorbers. Their working principle is that when the vehicle frame (or body) and axle vibrate and experience relative motion, the piston inside the shock absorber moves up and down. The oil in the shock absorber chamber repeatedly flows from one chamber to another through different orifices. At this time, the friction between the orifice walls and the oil, as well as the internal friction between oil molecules, creates a damping force on the vibration, converting the vehicle's vibration energy into oil heat energy, which is then absorbed by the shock absorber and dissipated into the atmosphere. With constant factors such as the cross-section of the oil passage, the damping force increases or decreases with the relative speed between the vehicle frame and axle (or wheels) and is related to the oil viscosity.

[0003] Existing shock absorbers typically use fixed-size channels on the piston to control the flow of oil between the upper and lower chambers. When a car travels over bumpy terrain, the flow of oil from the lower chamber to the upper chamber cannot be controlled according to the road conditions as the piston rod depresses. Consequently, the speed at which the piston rod moves downwards cannot be well controlled, and the optimal damping force cannot be achieved to overcome vehicle vibrations and ensure optimal vehicle stability. Passengers also cannot obtain the best riding comfort. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the existing technology, the present invention provides an automotive suspension shock absorber that can effectively solve the problem that the existing technology cannot control the oil flow from the lower chamber of the piston to the upper chamber on different bumpy road sections, so as to control the speed of the piston rod moving downward to achieve the best damping force and thus overcome the vibration of the car.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This invention provides an automotive suspension shock absorber, comprising a cylinder body, the cylinder body including an outer cylinder body and an inner cylinder body, the inner cylinder body being disposed within the outer cylinder body and sealed at both tops by a sealing element, a piston rod being slidably disposed within the sealing element, one end of the piston rod being disposed within the inner cylinder body and the end being connected to an extension post, the outer surface of the extension post having multiple sets of sliding grooves, and further comprising:

[0007] A buffer assembly is located at one end of an extension column. The buffer assembly includes a piston with a cavity. Multiple sets of arc-shaped grooves are equidistantly formed on the upper surface of the piston. Multiple sets of conical holes are formed in the bottom surface of the arc-shaped grooves extending into the cavity. Multiple sets of movable grooves are formed in the middle of the upper surface of the piston. The movable grooves are connected to sliding grooves. Guide rods are slidably arranged in the movable grooves and sliding grooves. One end of the guide rod is connected to an arc-shaped plug. Multiple sets of conical plugs are provided at the bottom of the arc-shaped plug. The other ends of the multiple sets of guide rods are connected by a limiting plate. A hollow column is provided in the middle of the cavity. A blocking member is rotatably provided outside the hollow column.

[0008] Furthermore, the piston has multiple sets of valve holes extending through its outer circumference, and a one-way valve is installed in each valve hole.

[0009] Furthermore, the outer surface of the hollow column is provided with shape memory metal, which has an arc-shaped curved structure.

[0010] Furthermore, the shielding component includes multiple sets of arc-shaped blocks distributed circumferentially at equal intervals. The multiple sets of arc-shaped blocks are connected to a rotating ring via connecting rods, and the rotating ring is sleeved on the outer surface of the hollow column.

[0011] Furthermore, a rotating groove is formed on the lower part of the inner wall of the rotating ring, and the shape memory metal is pressed into the rotating groove.

[0012] Furthermore, the buffer assembly divides the inner cylinder into an upper chamber and a lower chamber, and the space between the outer cylinder and the inner cylinder forms a C-chamber. The lower chamber and the C-chamber are connected by a regulating valve to achieve bidirectional flow of oil.

[0013] Furthermore, the conical plug is adapted to the size of the conical hole, and the arc-shaped plug is adapted to the size of the arc-shaped groove.

[0014] Furthermore, the arc-shaped block and the arc-shaped plug have the same shape.

[0015] Furthermore, the limiting disc is located at the bottom of the piston and connected to multiple sets of guide rods.

[0016] Furthermore, the lower surface of the piston has multiple sets of channels extending into the cavity.

[0017] The technical solution provided by this invention has the following advantages compared with the known prior art:

[0018] This invention provides an automotive suspension shock absorber. By setting a buffer component to accommodate the flow rate of oil from the lower chamber to the upper chamber in different bumpy road sections, the piston rod can always fall slowly, and the damping force it receives is within the optimal range to overcome the vibration of the car, thereby achieving optimal vehicle stability and providing passengers with good comfort. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the buffer component structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the internal structure of the piston of the present invention;

[0023] Figure 4 This is a schematic diagram of the exploded structure of the buffer assembly of the present invention;

[0024] Figure 5 This is a cross-sectional view of the conical hole and a schematic diagram of the conical plug structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the hollow column and the shielding component mating structure of the present invention;

[0026] Figure 7 This is a schematic diagram of the disassembled structure of the hollow column and the shielding component of the present invention;

[0027] Figure 8 For the present invention Figure 7 Enlarged view of point A in the middle.

[0028] The labels in the diagram represent: 1. Outer cylinder; 11. C chamber; 2. Inner cylinder; 21. Upper chamber; 22. Lower chamber; 3. Piston rod; 31. Extension column; 311. Slide groove; 4. Buffer assembly; 41. Piston; 411. Valve hole; 412. Arc groove; 413. Conical hole; 414. Movable groove; 42. Guide rod; 43. Arc plug; 44. Conical plug; 45. Limiting plate; 46. Hollow column; 461. Shape memory metal; 47. Shielding component; 471. Arc block; 472. Rotating ring; 4721. Rotating groove. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0030] The present invention will be further described below with reference to embodiments.

[0031] Example:

[0032] Please see Figures 1-8 A car suspension shock absorber includes a cylinder body, which includes an outer cylinder body 1 and an inner cylinder body 2. The inner cylinder body 2 is located inside the outer cylinder body 1 and its two tops are sealed by seals. It is worth noting that both the outer cylinder body 1 and the inner cylinder body 2 are cylindrical structures. Both the inner cylinder body 2 and the outer cylinder body 1 are filled with oil, and the upper part of the outer cylinder body 1 is filled with nitrogen.

[0033] A piston rod 3 is slidably provided inside the seal. One end of the piston rod 3 is located inside the inner cylinder 2 and is connected to an extension column 31. Multiple sets of sliding grooves 311 are provided on the outer surface of the extension column 31. The piston rod 3 and the inner cylinder 2 are coaxially arranged, and the extension column 31 and the piston rod 3 are coaxially arranged. The multiple sets of sliding grooves 311 are used to guide other components.

[0034] In addition, it also includes a buffer assembly 4, which is located at one end of the extension column 31. The buffer assembly 4 divides the inner cylinder 2 into an upper chamber 21 and a lower chamber 22. The space between the outer cylinder 1 and the inner cylinder 2 forms a C chamber 11. The lower chamber 22 and the C chamber 11 achieve bidirectional flow of oil through a regulating valve.

[0035] By setting up a buffer component 4 to control the flow rate of oil in the upper chamber 21 and the lower chamber 22, the piston rod 3 can rise quickly and fall slowly, thus achieving the purpose of effectively damping and cushioning the car under bumpy conditions.

[0036] Specifically, the buffer assembly 4 includes a piston 41 with a cavity. Multiple sets of valve holes 411 are opened through the upper surface of the piston 41 near the outer circumference, and a one-way valve is installed in the valve hole 411.

[0037] The one-way valve here controls the flow of oil from the lower chamber 22 to the upper chamber 21. The oil cannot flow from the upper chamber 21 to the lower chamber 22. When the piston rod 3 is pulled upward, the one-way valve opens, and the oil flows rapidly from the lower chamber 22 to the upper chamber 21. The damping force of the piston rod 3 is small, and the piston rod 3 rises faster.

[0038] The piston 41 has multiple sets of arc-shaped grooves 412 equidistantly arranged on its upper surface. The bottom surface of the arc-shaped grooves 412 extends into the cavity and has multiple sets of conical holes 413. The conical holes 413 are designed with a large opening at the top and a small opening at the bottom. By setting the conical holes 413, the flow rate of oil from the lower chamber 22 to the upper chamber 21 is controlled.

[0039] Multiple sets of movable grooves 414 are formed through the middle of the upper surface of piston 41. The movable grooves 414 are connected to the slide grooves 311. The movable grooves 414 are provided for the movement of other components.

[0040] The lower surface of piston 41 has multiple sets of channels extending into the cavity; these multiple sets of channels allow oil to pass from the lower chamber 22 through the channels and then through the tapered hole 413 into the upper chamber 21, so that the upper chamber 21 and the lower chamber 22 can communicate.

[0041] A guide rod 42 is slidably provided in the movable groove 414 and the sliding groove 311. The guide rod 42 has an L-shaped structure and consists of a horizontal part and a vertical part. One end of the horizontal part of the guide rod 42 is connected to an arc-shaped plug 43. The bottom of the arc-shaped plug 43 is provided with multiple sets of conical plugs 44. The conical plugs 44 are adapted to the size of the conical hole 413, and the arc-shaped plugs 43 are adapted to the size of the arc-shaped groove 412. The bottom of the arc-shaped plug 43 can be rounded to facilitate the arc-shaped plug 43 to be better inserted into the arc-shaped groove 412.

[0042] One end of the vertical part of the multiple sets of guide rods 42 is connected by a limiting plate 45, which is located below the bottom of the piston 41 and connected to the multiple sets of guide rods 42.

[0043] The vertical part of the guide rod 42 slides in the slide groove 311 and the movable groove 414 to control the up and down movement of the arc-shaped plug 43, and then control the up and down movement of the conical plug 44 in the conical hole 413, thereby controlling how much of the conical hole 413 is exposed, so as to realize the amount of oil flow from the lower chamber 22 to the upper chamber 21.

[0044] Please see Figure 5 When the pressure in the lower chamber 22 is too high, it will push the limiting plate 45 to move upward, which will cause the arc-shaped plug 43 to move upward and tend to disengage from the arc-shaped groove 412, and drive the conical plug 44 to tend to disengage from the conical hole 413. The degree to which the conical plug 44 disengages from the conical hole 413 is controlled according to the pressure, adapting to the pressure generated by different bumpy road sections, realizing the oil flow from the lower chamber 22 to the upper chamber 21, achieving the best damping, and thus achieving the best shock absorption effect.

[0045] A hollow column 46 is located in the center of the cavity. It is worth noting that the hollow column 46 has a hollow structure, and the movable groove 414 is located within the inner circle of the hollow column 46, thus not affecting the vertical movement of the guide rod 42. A shape memory metal 461 is located on the lower part of the outer surface of the hollow column 46. The shape memory metal 461 has an arc-shaped curved structure. By placing the shape memory metal 461 near the lower part, it can better sense temperature and deform, thereby enabling the movement of other components.

[0046] Initially, the shape memory metal 461 is bent and folded. As the piston rod 3 compresses the oil in the lower chamber 22, the temperature rises and the shape memory metal unfolds. When the temperature returns to the initial temperature, the shape memory metal 461 returns to its initial bent and folded state.

[0047] Furthermore, the hollow column 46 is provided with a shielding member 47 for external rotation; the shielding member 47 includes multiple sets of arc-shaped blocks 471 distributed circumferentially at equal intervals, the arc-shaped blocks 471 and the arc-shaped plugs 43 have the same shape; the arc-shaped blocks 471 are used to shield multiple sets of channels and conical holes 413, thereby limiting the flow rate of oil from the lower chamber 22 to the upper chamber 21.

[0048] Multiple sets of arc-shaped blocks 471 are connected to a rotating ring 472 via connecting rods. The rotating ring 472 is fitted onto the outer surface of the hollow column 46, and the rotating ring 472 and the hollow column 46 are in rotatable engagement. A rotating groove 4721 is formed in the lower part of the inner wall of the rotating ring 472. Shape memory metal 461 is disposed in the rotating groove 4721, with one end of the shape memory metal 461 contacting the inner wall of the rotating groove 4721, and the shape memory metal 461 and the rotating groove 4721 are in a compression engagement. When the temperature rises, the shape memory metal 461 unfolds, compressing the inner wall of the rotating groove 4721, thereby causing the rotating ring 472 to rotate, which in turn drives the arc-shaped blocks 471 to rotate. This allows control over the number of opening conical holes 413 and channels to adapt to different bumpy road conditions and the flow rate of the oil, thereby controlling the appropriate damping to achieve a good buffering and shock absorption effect.

[0049] Working principle: When the car is on a normal bumpy road, the piston rod 3 moves down to compress the oil in the lower chamber 22. At this time, the pressure in the lower chamber 22 increases, pushing the limit plate 45 to move up and the guide rod 42 to move up. Depending on the degree of bumpiness, the guide rod 42 moves up to different degrees, which makes the opening gap of the conical plug 44 in the conical hole 413 different. At the same time, the temperature rises, causing the shape memory metal 461 to expand to a certain extent, causing the arc block 471 to rotate and open a certain number of channels and conical holes 413 (the certain number here is less than the total number). This allows the oil in the lower chamber 22 to enter the upper chamber 21 from the certain number of channels and the certain number of opened conical holes 413. At this time, the damping force just plays a good role in shock absorption and buffering.

[0050] When the car passes over a large pothole, the vibration amplitude is too large, and the piston rod 3 tends to move downward quickly to compress the oil in the lower chamber 22. The pressure difference between the upper chamber 21 and the lower chamber 22 is too large, and the limit plate 45 cannot react quickly and rise. At this time, because the piston rod 3 moves upward quickly, the oil temperature rises instantly, which makes the shape memory metal 461 expand to a larger range, quickly opening multiple channels and multiple conical holes 413. This allows the oil to enter the upper chamber 21 from the channels and multiple conical holes 413 to release the pressure, so that the damping force is just right, and the shock absorption effect is optimal.

[0051] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A car suspension shock absorber, comprising a cylinder body, the cylinder body comprising an outer cylinder body (1) and an inner cylinder body (2), the inner cylinder body (2) being disposed within the outer cylinder body (1) and sealed at both tops by a sealing member, a piston rod (3) being slidably disposed within the sealing member, one end of the piston rod (3) being disposed within the inner cylinder body (2) and the end being connected to an extension post (31), the outer surface of the extension post (31) having multiple sets of sliding grooves (311), characterized in that, Also includes: A buffer assembly (4) is located at one end of an extension column (31). The buffer assembly (4) includes a piston (41) with a cavity. Multiple sets of arc-shaped grooves (412) are equidistantly arranged on the upper surface of the piston (41). Multiple sets of conical holes (413) are opened through the bottom surface of the arc-shaped grooves (412) into the cavity. Multiple sets of movable grooves (414) are opened through the middle of the upper surface of the piston (41). The movable grooves (414) are connected to the sliding grooves (311). Guide rods (42) are slidably arranged in the movable grooves (414) and the sliding grooves (311). One end of the guide rods (42) is connected to an arc-shaped plug (43). Multiple sets of conical plugs (44) are provided at the bottom of the arc-shaped plugs (43). The other ends of the multiple sets of guide rods (42) are connected through a limiting plate (45). A hollow column (46) is provided in the middle of the cavity. A shielding member (47) is rotatably arranged outside the hollow column (46). The piston (41) has multiple sets of valve holes (411) through it in the outer circumference, and a one-way valve is installed in the valve hole (411); the hollow column (46) has a shape memory metal (461) on its outer surface, and the shape memory metal (461) has an arc-shaped curved structure. The shielding component (47) includes multiple sets of arc-shaped blocks (471) distributed circumferentially. The multiple sets of arc-shaped blocks (471) are connected to a rotating ring (472) via connecting rods. The rotating ring (472) is sleeved on the outer surface of the hollow column (46). The lower part of the inner wall of the rotating ring (472) is provided with a rotating groove (4721), and the shape memory metal (461) is pressed and fitted with the rotating groove (4721).

2. The automotive suspension shock absorber according to claim 1, characterized in that, The buffer assembly (4) divides the inner cylinder (2) into an upper chamber (21) and a lower chamber (22). The space between the outer cylinder (1) and the inner cylinder (2) forms a C chamber (11). The lower chamber (22) and the C chamber (11) achieve bidirectional flow of oil through a regulating valve.

3. The automotive suspension shock absorber according to claim 2, characterized in that, The conical plug (44) is adapted to the size of the conical hole (413), and the arc-shaped plug (43) is adapted to the size of the arc-shaped groove (412).

4. The automotive suspension shock absorber according to claim 3, characterized in that, The arc-shaped block (471) and the arc-shaped plug (43) have the same shape.

5. A car suspension shock absorber according to claim 4, characterized in that, The limiting plate (45) is located at the bottom of the piston (41) and is connected to multiple sets of guide rods (42).

6. A car suspension shock absorber according to claim 5, characterized in that, The piston (41) has multiple sets of channels extending through its lower surface into the cavity.

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